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TruePx: Pixel Ruler, CSS Inspector & SEO Checker

Chrome extension by Aditya · Productivity · Developer

A Chrome extension in Productivity · Developer with 3 users, barely installed.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
3
Rating
not rated yet
Users, last 4 days
+3
Version
1.0.1
Updated in the store
2026-10-04
Published
2026-09-30
Manifest
V3
Browser access
7 permissions

How it has moved

Users
+3 since 01.10
0-3 · 2 readings
2026-10-01: appeared in the store2026-10-04: released 1.0.1
  1. 2026-10-010appeared in the store
  2. 2026-10-043released 1.0.1
Users
+3 since 01.10
0-3 · 2 readings
2026-10-01: appeared in the store2026-10-04: released 1.0.1
  1. 2026-10-010appeared in the store
  2. 2026-10-043released 1.0.1

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

  • See the address and title of every tab you have open tabs
  • Block or redirect requests on the sites it can access declarativeNetRequestWithHostAccess
  • Run its own code on the pages it can access scripting
Show the remaining 4
  • Act on the current tab, but only after you click it activeTab
  • Add items to the right-click menu contextMenus
  • Open a panel beside the page sidePanel
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 1.0.1

What changed recently

  1. Released version 1.0.1 (was 1.0.0)
  2. Store badges changed
  3. Store description rewritten
Show the remaining 1
  1. Appeared in the store

The publisher

Aditya publishes 2 listings we track, 10 users between them. Listed website: truepx.vercel.app.

  1. OpenTool Aditya · Productivity · Tools · published 2026-08-23 7 users (last published figure)

Like this one

Listings the catalog judges closest in what they say they do.

  1. PixelProbe Inspector Describes nearly the same job, smaller audience 5 users ★ 5.0
  2. Pixefy - Responsive Design Checker Describes nearly the same job, with an established audience 10k users ★ 4.5
  3. INSPEKT Describes nearly the same job, smaller audience 19 users
  4. InspectDev Describes nearly the same job, smaller audience 25 users ★ 5.0
  5. Developer Tool in One: SEO, Ruler & Text Checker And More Describes nearly the same job, smaller audience 15 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.